Optimal Metabolite Curve Fitting for Kinetic Modeling of 11C-WAY-100635

Journal of Nuclear Medicine

J. John Mann¹  Ramin V. Parsey¹  R. Todd Ogden¹  Songmei Wu¹ 

关键词: nonlinear modeling;    residual analysis;    kinetic modeling;   

DOI  :  10.2967/jnumed.106.038075

学科分类：医学（综合）

来源: Society of Nuclear Medicine

【 摘 要 】

Many quantitative imaging protocols that make use of a metabolite-corrected arterial input function require the use of a mathematic model to describe the rate of metabolism of the radioligand. Commonly, parametric models are fit to metabolism data and then the fitted model is used to correct the plasma input function. 11C-WAY 100635 is a rapidly metabolized radioligand used extensively in mapping the 5-hydroxytryptamine receptor 1A system. Methods: To evaluate the adequacy of fit of 4 metabolite models, we examined data from 92 subjects who received an injection of 11C-WAY 100635, were imaged with PET, and underwent measurement of total plasma concentration and metabolites. The performance of these models was assessed according to residual plots, as well as fit and information criteria. Results: The study showed that the choice of model has a substantial effect on the resulting estimates of outcome measures. Conclusion: Among the models considered, the Hill model provides the best fit across all criteria.

【 授权许可】

Unknown